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Update. I got the Q4 back from a relatively local Audi dealer, and the heat pump works after they replaced the compressor. I helped them find R-744 refrigerant from Linde (part number CD 3.0RG-QS) after they planned to wait indefinitely for Audi to ship it. Audi advised local sourcing almost a...

I’m really in a bind with the heat pump on my 2023 Q4. It’s totally not working, and the dealership’s been throwing darts at it but can’t nail it down. They’re missing some refrigerant or gear or whatever, and they've been waiting for almost 2 freaking years! I’m losing my mind over here...